Pegylated recombinant human granulocyte-colony stimulating factor(PEG-rhG-CSF) is a first class national new drug developed by domestic pharmaceutical companies. According to some phase Ⅱand phase Ⅲ clinical trials, PEG-rhG-CSF has a good effect. The patients need only one injection for PEG-rhG-CSF each Cycle of chemotherapy, and the effect of rising white blood cell is more smoothly, and it can avoid pain of repeated injection of PEG-rhG-CSF